"They must have felt safe out there," doping official Hans Cooman told the Associated Press on Monday.

But Cooman and two colleagues got the necessary papers to check the tournament in the Netherlands. And when they identified themselves just before the event—with the 20 bodybuilders weighing in and preparing themselves—the testers drew quite a response.

The bodybuilders got up and left, preferring to quit rather than submit to doping tests. Some grabbed their gear and headed straight out the door.

"They must have been flabbergasted," Cooman said.

If scurrying away like ants isn't an admission of guilt, then I don't know what is.